Elevator-door lock



Dec. \4, 1923. 1,476,254

M. JACOBSKY ELEVATOR DOOR LOCK ATTORNEY.

Patented Dec. 4, 1923.

UNITED STATES MAXIM JACOBSKY, OF NEW YORK, N. Y.

ELEVATOR-DOOR LOCK.

Application filed February 24, 1923. Serial No. 620,912.

To all whom it may concern.'

Be it known that I, MAXIM JACOBSKY, a citizen of Poland, residing at New York, county of New York, and State of New York, have invented certain new and useful Improvements in Elevator-Door Locks, of which the following is a specification.

This invention relates to improvements in locks, particularly locks intended for use with elevator doors and it is the principal object of my invention to provide a lock of this type which will automatically lock the elevator door in its closed position, thus preventing accidents.

Another obj ect of the invention is to provide a simple elevator door lock which is inexpensive to manufacture, durable, and which can be readily attached to any elevator door now in common use.

A. further object of the invention is to provide a lock which is also adapted for use with car doors, as for instance subway cars, or, with the operation by a key for house doors, or the like, in short with doors of all descriptions.

A still further object of the invention is the provision of a lock allowing an adjustment of the operating parts to suit the varying measurement of the door jambs.

It is also the object of my invention to provide a readily and conveniently operating handle for opening the locked door by an easy manipulation of the handle.

These and other objects of my invention will become more fully known as the description thereof proceeds, and will then be specific-ally pointed out in the appended claims.

In the accompanying drawings, forming a material part of this disclosure: K

Figure 1 is a side elevation of an elevator lock constructed according to the present invention.

Figure 2 is a similar view with the cover removed, with the lock in open position looking inthe direction of arrows 2-2 of Figure 4.

Figure 3 is aI view similar to Figure 2 with the lock in locking position.

Figure 4 is a longitudinal section through the lock on line 4--4 of Figure 1.

Figure 5 is an end view.

Figure 6 is a cross-section on line 6 6 of Figure 2.

s illustrated in Figures 1 to 6 inclusive, the lock comprises a casing 10 adapted to be secured to an elevator door and closed at its front by means of a cover plate 11 adapted to be attached to the casing by means of screws 12, 13, 14, 15 adapted to enter suitable holes in the corner pieces 16, 17, 18, 19 in the casing.

The cover plate 11 has a central opening 20 for the reception of the hand of the operator for operating a finger grip or handle 21 pivotally secured at its lower end by means of a screw 22 entering a socket 23 in the casing. i

Integrally made with the casing is a guide block 24 arranged at the upper end of one -of the edges of the casing and recessed as at 25 to guide a locking latch 26 upon the outer end of a stem 27, the central part of which within casing 10 is provided with a spiral groove 28, while its rear end is revolving in a lip 29 on al block 30, provided with a longitudinal slot 31 in its body part.

This block is movable within casing 10, and the shaft 32 of a screw 33 is guided within slot 31. An adjusting screw 34 is passed through corner vpiece 18 and block and is adapted to enter corner piece 19 and block 30 can be adjusted in the direction of its longitudinal aXis within the casing by the proper manipulation of screw 34 for a purpose hereinafter more fully to be explained.

Within the casing 10', an operating lever 35 is pivotally secured near one of its ends to a pin 36 proiecting from the rear wall of the casing, and through a suitable perforation in its lower end, a horizontal bar 37 is guided, which carries collars 38 and 39 to both sides of the lever 35, and a collar 40 near its front end which is formed into a head 41 projecting out of casing 10 at the lower end of the edge thereof which carries block 24 near its upper end. 4

A spiral spring 42 is wound around bar 37 between collars/40 and 39 tending-to nor* inally hold thehead 41 in its extendedposition. The rear end 'of bar 37 beyond vcollar 38 is engaged by the lower end of a leaf spring 43 attached at its upper end as at 44 to the inner edge wall of the casing l0.

The upper end of lever is pivotally secured as at 45 between the forked ends of a link 46, lthe other end of which carries angularly disposed thereto two jaws or cheeks 47, 47 connected by two pins 48, 49 engaging between themselves the spiral groove 28 of stem 27. l y

The handle 2l is provided with an inner socket 50 adapted to engage socket 23 Vand has also an inner lateraldepending flange 5l adapted to engage' the inner wall of opening 20 and shoulders 52 in cover plate `to limitthe movements Ifofvhandle 2,1 in one and the other direction.

The device loperates as follows:

Vhen the,eh'vatofr "door is moved into closing ,position by. the, elevator operator, or fslamllthe liead,4l will engagethe keeper in ,thefjambv ofthe door and will be pressed inwardly by the k,Contact therewith. v.This inward motion fofhead 4l and ,consequently its shaft or bar 37 will be communieatedbv the` engagementof ,collar 39 with vlever 35 to said levefiywhich in turnwill lmove link 46 towardsthe left sothatpins 48 and 49 gliding along 4the outer edges of spiral groove 28 will impart, to lstem 27 a rotary motioinsufli'cient to turn latch k26 from its `normal ,position Figures l andv 2 into its llocking position illustrated in 'Figure l3, in

which willwremain; until handle 2l is voperatedbyturning tvto 'the right, so lthat itsfrlaiigefl will engage lever 43,5v pressing the,samefbackgagainst the; aCtiOi-i" of springs 42 and 43 v so that link46 :glides in theoppQSite direction alongfthe helical groove 28 of bar37, andfthisvbar will be rotated to allowing an opening of the door.

An adjustmentvofthe block 30 by means of screw 34 will-*permit fan accommodation ofthe lockrto" variouslsiz'es of door jambs.

will be clear that changesmaybe made in the general arrangement and r in the constructiony of the minor details of my invention without departing from, thekscope and spirit thereof I-laving` thus desoribedmy invention, what I claii'nfas new, and desire tousecure .by Let'ls,Patent ofthe United States is:

1,A`-lock comprising a locking member, meansv for v.auto,matically (moving. saidmeinberiinto' locking position upon the closure ,offa door, hand operated means for returnins Seid ,member 'into itsrisal unlocking position; and. Ineens forfallowng .an adjustment of Vsaid locking member to suit various door jambs. n l y Y 2. v lock comprising a rotatably arranged locking. member," @spring 'C@intr011e@ Corr LC' mlmb'e'lllvf Ui 'i i vS O .TOIg QSELd ,400k- I l Y Adoor jamb constructions. jbringlatch- 26 -into its unlockingV position I the operation of said Contact member, a hand operated handle for operating said member, rotating means to rotate said locking member into its original unlocking position, and means to accommodate the locking member to various door jainbs.

r3. In a lock of the class described, a rotating locking member, having a spiral groove, an operating lever, adapted to en gage the spiralA groove walls for rotating said member into and out of its locking position, spring controlled Contact means for operatingsaid leverto rotate said locking member 'intovv its locking position, a handle for operating said lever to turn said locking member intoit's normal unlocking position,

andmeans forV allowing an adjustment of said locking member to suit various sizes of, door ljambs. l

4. In a lock ofthe class described a rotatablyarranged locking member having a.

.spiral groove, "an operating, lever vpivoted near its lower end, a-link attached to said lever adapted to I, engage the `walls vo f Athe spiral groove ofSLClmember for `rotating thfesame upon theioperation of said lever,

a spring controlled-rod, a contact headyon said rod projectingyout of the lock casing, means on said rod for engaging said lever Ito operate the same to turn said locking member into lockingposition upon the engagement of said head'by adoorja-mb, a handle having l,'tflange adapted to engage said lever forzrotating said locking member `into its normal unlockingposition, afsliding block lforming a `bearing, for the rear end of saidflocking member, and a. screw passed through said block for allowingpan adjustment of said locking member to suit various 5. A lock comprising a-casing, a remove able front cover for said casing having a central opening, shoulders kformed in the wallslimiting said opening, a rotary locking` membertransversely arranged in Said 1 casing and- .ha-ving` a spiral groove within the same, a latch head on said member projecting from said casing, a perforated sliding block in whiclrthe rear end lof said locking member is guided, means for guiding said block iii said casing, a screw passed through said block for allowing an adjust ment of thesame and yof the member-'to project said latch head tofsuit the varying d oor jamb constructions, a pair of cheeks, a pair of ypins connect-ing lsaid cheeks and engaging the vwalls of the spiral groove of said locking member, a link carryingsaid cheeks and having a. forked rear end,fan operating lever pivoted to y the rear wallkof said casingv near its lower end, its upper end pivoted between theprongsl forming the forked end ofvsaid link, a Contact rod* passedthrough the ex- .treme lower mend ofsaid lever, collars on said r'od in fro'ntfandrear of saidlever, .a

spring wound around said rod adapted to into its normal unlocking position, the end press its head out of the casing, a leaf spring 'of said flange adapted to engage the shoulengaging the rear end of said rod, a handle ders formed in the cover opening for limit- 10 rotatably secured near its lower end to said ino' the inward movements of Said handle.

5 cover, a flange on said handle adapted to n testimony whereof I have aixed my engage said operating lever for normally signature. operating said looking member to return MAXIM JACOBSKY. 

